ANT-916-PML-ccc Data Sheet by Product Description 8.2 mm 12.1 mm Designed for permanent attachment, the PML (0.32 ) (0.48 ) -wave whip tilts 180 degrees and delivers outstanding performance in a cost-effective package. An internal counterpoise eliminates external ground plane dependence and maximizes performance. The antenna is attached by placing Available with its base through a (6.35 mm) hole in the product Straight Cut Cable and securing it with a nut or by threading it into or U.FL Connector a PEM-style insert. This method of attachment is highly secure and saves the cost of an antenna 123.0 mm (4.84 ) connector. The PML attaches to a PCB or I-PEX silhouette shown in shadow 150.3 mm connector via 12 (30.48 cm) of RG-178 coax (5.92 ) cable. It is also available with 1.32 mm coax cable terminated with a U.FL/MHF compatible connector. This saves the labor of adding a connector while 7.9 mm using one that is small enough to fit through the (0.31 ) antennas mounting hole. Custom lengths and terminations are available by special order. Features 35.2 mm (1.39 ) Cost-effective Internal counterpoise Tilts 180 degrees 6.0 mm Outstanding performance (0.24 ) Omni-directional pattern Low VSWR Integral 12 (30.48 cm) RG-178 coax cable or 1.32 mm coax (U.FL) Electrical Specifications Ordering Information Center Frequency: 916MHz ANT-916-PML (with straight cut RG-178 coax) Recom. Freq. Range: 881-951MHz ANT-916-PML-UFL (with U.FL/MHF compatible Bandwidth: 70MHz connector and 1.32mm coax) Wavelength: -wave VSWR: 1.9 typical Peak Gain: 0.4dBi max Impedance: 50-ohms Cable: 12 (30.48 cm) RG-178 or 1.32 mm coax (U.FL) Connection: Straight-cut or U.FL/MHF Oper. Temp. Range: 40C to +90C Electrical specifications and plots measured on 10.16 cm x 10.16 cm (4.00 x 4.00) reference ground plane 1 Revised 8/1/2017VSWR Graph VSWR 1.131 Reflected Power 25% 3:1 11% 2:1 0% 1:1 816MHz 916MHz 1016MHz What is VSWR The Voltage Standing Wave Ratio (VSWR) is a measurement of how well an antenna is matched to a source impedance, typically 50-ohms. It is calculated by measuring the voltage wave that is headed toward the load versus the voltage wave that is reflected back from the load. A perfect match has a VSWR of 1:1. The higher the first number, the worse the match, and the more inefficient the system. Since a perfect match cannot ever be obtained, some benchmark for performance needs to be set. In the case of antenna VSWR, this is usually 2:1. At this point, 88.9% of the energy sent to the antenna by the transmitter is radiated into free space and 11.1% is either reflected back into the source or lost as heat on the structure of the antenna. In the other direction, 88.9% of the energy recovered by the antenna is transferred into the receiver. As a side note, since the :1 is always implied, many data sheets will remove it and just display the first number. How to Read a VSWR Graph VSWR is usually displayed graphically versus frequency. The lowest point on the graph is the antennas operational center frequency. In most cases, this is different than the designed center frequency due to fabrication tolerances. The VSWR at that point denotes how close to 50-ohms the antenna gets. Linx specifies the recommended bandwidth as the range where the typical antenna VSWR is less than 2:1. Copyright 2017 Linx Technologies 159 Ort Lane, Merlin, OR 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 2 ANT-916-PML-ccc Data Sheet www.linxtechnologies.com by